Chapter 9: Part 5 Pheromones

Question 1

what is the lee-boot effect?

Answer 1

physiology. When groups of female mice are housed together, their estrous cycles slow down and eventually stop. The slowing and eventual cessation of estrous cycles in groups of female animals that are housed together; caused by a pheromone in the animals’ urine; first observed in mice.

Question 2

what is the Whitten effect?

Answer 2

If groups of females are exposed to the odor of a male (or of his urine), they begin cycling again, and their cycles tend to be synchronized.

Question 3

what is the Vandenbergh effect?

Answer 3

is the acceleration of the onset of puberty in a female rodent caused by the odor of a male.

Question 4

what is the bruce effect?

Answer 4

When a recently impregnated female mouse encounters a normal male mouse other than the one with which she mated, the pregnancy is very likely to fail. This effect, too, is caused by a substance secreted in the urine of intact males—but not of males that have been castrated.

Question 5

what it the vomeronasal organ?

Answer 5

sensory organ that detects the presence of certain chemicals, especially when a liquid is actively sniffed; mediates the effects of some pheromones. basically detects pheromones

Question 6

what receives information from the vomeronasal organ?

Answer 6

accessory olfactory bulb